1 0 GfsSimulation GfsBox GfsGEdge {} {
    Time { iend = 0 end = 1 }
    AdvectionParams { scheme = none }
    ApproxProjectionParams { tolerance = 1e-6 }
    Refine LEVEL
    Solid (ellipse (0.25, 0.25, 0.1, 0.1))
    Solid (ellipse (-0.25, 0.125, 0.15, 0.1))
    Solid (ellipse (0., -0.25, 0.2, 0.1))
    Init {} { U = 1 }
    OutputSimulation { start = end } sim-LEVEL {
        variables = U,V,P
    }
}
GfsBox {
    left = Boundary { BcDirichlet U 1 }
    right = Boundary { BcDirichlet U 1 }
}